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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
29/12/2015 |
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Data da última atualização: |
25/01/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, F. M. L.; DONEGA, M. A.; CERDEIRA, A. L.; CORNIANI, N.; VELINI, E. D.; CANTRELL, C. L.; DAYAN, F. E.; COELHO, M. N.; SHEA, K.; DUKE, S. O. |
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Afiliação: |
FERDINANDO MARCOS LIMA SILVA, FCA-UNESP; MATHEUS AUGUSTO DONEGA, ESALQ-USP; ANTONIO LUIZ CERDEIRA, CNPMA; NATALIA CORNIANI, FCA-UNESP; EDIVALDO DOMINGUES VELINI, FCA-UNESP; CHARLES L CANTRELL, USDA-ARS; FRANCK E DAYAN, USDA-ARS; MARIANA E COELHO, UFF; KATRIONA SHEA, Pennsylvania State University; STEPHEN O DUKE, USDA-ARS. |
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Título: |
Roots of the invasive species Carduus nutans L. and C. acanthoides L. produce large amounts of aplotaxene, a possible allelochemical. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Journal of Chemical Ecology, New York, v. 40, n. 3, p. 276-284, 2014. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The invasive thistle Carduus nutans has been reported to be allelopathic, yet no allelochemicals have been identified from the species. In a search for allelochemicals from C. nutans and the closely related invasive species C. acanthoides, bioassay-guided fractionation of roots and leaves of each species were conducted. Only dichloromethane extracts of the roots of both species contained a phytotoxin (aplotaxene, (Z,Z,Z)-heptadeca-1,8,11,14-tetraene) with sufficient total activity to potentially act as an allelochemical. Aplotaxene made up 0.44 % of the weight of greenhousegrown C. acanthoides roots (ca. 20 mM in the plant) and was not found in leaves of either species. It inhibited growth of lettuce 50%(I50) in soil at a concentration of ca. 0.5 mg g?1 of dry soil (ca. 6.5 mM in soil moisture). These values gave a total activity in soil value (molar concentration in the plant divided by the molarity required for 50 % growth inhibition in soi l = 3.08) similar to those of some established allelochemicals. The aplotaxene I50 for duckweed (Lemna paucicostata) in nutrient solution was less than 0.333 mM, and the compound caused cellular leakage of cucumber cotyledon discs in darkness and light at similar concentrations. Soil in which C. acanthoides had grown contained aplotaxene at a lower concentration than necessary for biological activity in our short-term soil bioassays, but these levels might have activity over longer periods of time and might be an underestimate of concentrations in undisturbed and/or rhizosphere soil. MenosAbstract: The invasive thistle Carduus nutans has been reported to be allelopathic, yet no allelochemicals have been identified from the species. In a search for allelochemicals from C. nutans and the closely related invasive species C. acanthoides, bioassay-guided fractionation of roots and leaves of each species were conducted. Only dichloromethane extracts of the roots of both species contained a phytotoxin (aplotaxene, (Z,Z,Z)-heptadeca-1,8,11,14-tetraene) with sufficient total activity to potentially act as an allelochemical. Aplotaxene made up 0.44 % of the weight of greenhousegrown C. acanthoides roots (ca. 20 mM in the plant) and was not found in leaves of either species. It inhibited growth of lettuce 50%(I50) in soil at a concentration of ca. 0.5 mg g?1 of dry soil (ca. 6.5 mM in soil moisture). These values gave a total activity in soil value (molar concentration in the plant divided by the molarity required for 50 % growth inhibition in soi l = 3.08) similar to those of some established allelochemicals. The aplotaxene I50 for duckweed (Lemna paucicostata) in nutrient solution was less than 0.333 mM, and the compound caused cellular leakage of cucumber cotyledon discs in darkness and light at similar concentrations. Soil in which C. acanthoides had grown contained aplotaxene at a lower concentration than necessary for biological activity in our short-term soil bioassays, but these levels might have activity over longer periods of time and might be an underestimate... Mostrar Tudo |
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Palavras-Chave: |
Aplotaxene; Phytotoxin; Phytotoxina. |
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Thesagro: |
Alelopatia; Erva daninha. |
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Thesaurus Nal: |
Allelochemicals; Allelopathy; Carduus acanthoides; Carduus nutans. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02538naa a2200337 a 4500
001 2032640
005 2016-01-25
008 2014 bl uuuu u00u1 u #d
100 1 $aSILVA, F. M. L.
245 $aRoots of the invasive species Carduus nutans L. and C. acanthoides L. produce large amounts of aplotaxene, a possible allelochemical.$h[electronic resource]
260 $c2014
520 $aAbstract: The invasive thistle Carduus nutans has been reported to be allelopathic, yet no allelochemicals have been identified from the species. In a search for allelochemicals from C. nutans and the closely related invasive species C. acanthoides, bioassay-guided fractionation of roots and leaves of each species were conducted. Only dichloromethane extracts of the roots of both species contained a phytotoxin (aplotaxene, (Z,Z,Z)-heptadeca-1,8,11,14-tetraene) with sufficient total activity to potentially act as an allelochemical. Aplotaxene made up 0.44 % of the weight of greenhousegrown C. acanthoides roots (ca. 20 mM in the plant) and was not found in leaves of either species. It inhibited growth of lettuce 50%(I50) in soil at a concentration of ca. 0.5 mg g?1 of dry soil (ca. 6.5 mM in soil moisture). These values gave a total activity in soil value (molar concentration in the plant divided by the molarity required for 50 % growth inhibition in soi l = 3.08) similar to those of some established allelochemicals. The aplotaxene I50 for duckweed (Lemna paucicostata) in nutrient solution was less than 0.333 mM, and the compound caused cellular leakage of cucumber cotyledon discs in darkness and light at similar concentrations. Soil in which C. acanthoides had grown contained aplotaxene at a lower concentration than necessary for biological activity in our short-term soil bioassays, but these levels might have activity over longer periods of time and might be an underestimate of concentrations in undisturbed and/or rhizosphere soil.
650 $aAllelochemicals
650 $aAllelopathy
650 $aCarduus acanthoides
650 $aCarduus nutans
650 $aAlelopatia
650 $aErva daninha
653 $aAplotaxene
653 $aPhytotoxin
653 $aPhytotoxina
700 1 $aDONEGA, M. A.
700 1 $aCERDEIRA, A. L.
700 1 $aCORNIANI, N.
700 1 $aVELINI, E. D.
700 1 $aCANTRELL, C. L.
700 1 $aDAYAN, F. E.
700 1 $aCOELHO, M. N.
700 1 $aSHEA, K.
700 1 $aDUKE, S. O.
773 $tJournal of Chemical Ecology, New York$gv. 40, n. 3, p. 276-284, 2014.
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Embrapa Meio Ambiente (CNPMA) |
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| 4. |  | VALARINI, M. J.; MECELIS, N. R.; VEASEY, L. A.; ALCANTARA, P. B.; ALCANTARA, V. de B. G.; TULMAN NETO, A. Sensitivity of Jaragua grass (Hyparrhenia rufa) to gamma radiation. Boletim de Industria Animal, Nova Odessa, v. 53, n. único, p. 57-60, 1996. Título em português: Sensitividade do capim Jaraguá (Hyparrhenia rufa) a radiação Gama.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 7. | | VEASEY, E. A.; VALARINI, M. J.; MECELIS, N. R.; ALCANTARA, P. B.; ALCANTARA, V. de B. G.; TULMAN NETO, A.; ABBADO, M. R.; CARDELLI, M. A. Use of gamma-radiation to increase genetic variability in Jaragua grass (Hyparrhenia rufa). Boletim de Industria Animal, Nova Odessa, v. 53, n. ùnico, p. 61-64, 1996. Título em português: Uso de radiação gama para aumentar a variabilidade genética em capim Jaraguá (Hyparrhenia rufa).| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 7 | |
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